package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.apache.poi.openxml4j.exceptions.OpenXML4JRuntimeException;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * @author majun
 * @package sky-take-out
 * @date 2024/6/1 : 下午7:45
 */

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {

        //处理各种业务异常，用户地址为空，购物车数据为空
        AddressBook addressBook = addressBookMapper.getFromById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            //抛出业务异常
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);

        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

        if (list == null || list.size() == 0) {
            //抛出业务异常
            throw new AddressBookBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //地址的拼接
        String city = addressBook.getProvinceName() + addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail();

        //查询用户信息
        User user = userMapper.getById(userId);

        //向订单表插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setAddress(city);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()) + userId);
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);
        orders.setUserName(user.getName());

        orderMapper.insert(orders);

        ArrayList<OrderDetail> orderDetailArrayList = new ArrayList<>();
        //向订单明细表插入n条数据
        for (ShoppingCart cart : list) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId()); //设置当前订单明细关联的订单id
            orderDetailArrayList.add(orderDetail);
        }
        //批量插入
        orderDetailMapper.insertBatce(orderDetailArrayList);

        //订单提交成功后清空用户购物车
        shoppingCartMapper.deteleUserId(userId);

        //封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();

        return orderSubmitVO;

    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO payment(OrdersPaymentDTO ordersPaymentDTO) {

        Orders orders = new Orders();
        orders.setPayMethod(ordersPaymentDTO.getPayMethod());
        orders.setNumber(ordersPaymentDTO.getOrderNumber());
        orders.setStatus(Orders.TO_BE_CONFIRMED);
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setPayStatus(Orders.PAID);

        orderMapper.upData(orders);

        Orders orders1 = orderMapper.getFormByNumber(ordersPaymentDTO.getOrderNumber());

        OrderSubmitVO orderSubmitVO = new OrderSubmitVO();
        orderSubmitVO.setId(orders1.getId());
        orderSubmitVO.setOrderTime(orders1.getOrderTime());
        orderSubmitVO.setOrderNumber(orders1.getNumber());
        orderSubmitVO.setOrderAmount(orders1.getAmount());

        //通过webSocket向服务器发消息
        Map map = new HashMap();
        map.put("type", 1); //1表示来单提醒 2表示用户催单
        map.put("orderId", orders1.getId());
        map.put("content", "订单号：" + orders1.getNumber());

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);

        return orderSubmitVO;

    }

    /**
     * 用户催单
     *
     * @param id
     */
    public void reminder(Long id) {

        Orders orders = orderMapper.getFromById(id);

        if (orders == null) {
            throw new OpenXML4JRuntimeException(MessageConstant.ORDER_NOT_FOUND);
        }

        //通过webSocket向服务器发消息
        Map map = new HashMap();
        map.put("type", 2); //1表示来单提醒 2表示用户催单
        map.put("orderId", orders.getId());
        map.put("content", "订单号：" + orders.getNumber());

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);

    }

    /**
     * 用户端订单分页查询
     *
     * @param pageNum
     * @param pageSize
     * @param status
     * @return
     */
    public PageResult pageQuery4User(int pageNum, int pageSize, Integer status) {
        // 设置分页
        PageHelper.startPage(pageNum, pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        // 分页条件查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList();

        // 查询出订单明细，并封装入OrderVO进行响应
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                Long orderId = orders.getId();// 订单id

                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(), list);
    }

    /**
     * 用户端查询订单详情
     *
     * @param id
     * @return
     */
    public OrderVO details(Long id) {
        // 根据id查询订单
        Orders orders = orderMapper.getFromById(id);

        // 查询该订单对应的菜品/套餐明细
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将该订单及其详情封装到OrderVO并返回
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }

    /**
     * 用户取消订单
     *
     * @param id
     */
    public void userCancelById(Long id) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getFromById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.upData(orders);
    }

    /**
     * 再来一单
     *
     * @param id
     */
    public void repetition(Long id) {
        // 查询当前用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        // 将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 管理端订单搜索
     *
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {

        //设置分页
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrdersDTO> list = new ArrayList();

        // 查询出订单明细，并封装入OrderVO进行响应
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                Long orderId = orders.getId();// 订单id

                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);

                OrdersDTO ordersDTO = new OrdersDTO();
                BeanUtils.copyProperties(orders, ordersDTO);
                ordersDTO.setOrderDetails(orderDetails);

                list.add(ordersDTO);
            }
        }

        return new PageResult(page.getTotal(), list);

    }

    /**
     * 管理端查询订单详情
     *
     * @param id
     * @return
     */
    public OrderVO admindetails(Long id) {

        Orders orders = orderMapper.getFromById(id);

        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        OrderVO orderVO = new OrderVO();

        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;

    }

    /**
     * 接单
     *
     * @param ordersConfirmDTO
     */
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {

        Orders orders = new Orders();

        BeanUtils.copyProperties(ordersConfirmDTO, orders);

        orders.setStatus(Orders.CONFIRMED);

        orderMapper.upData(orders);

    }

    /**
     * 派送订单
     *
     * @param id
     */
    public void delivery(Long id) {

        Orders orders = new Orders();

        orders.setId(id);
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);

        orderMapper.upData(orders);

    }

    /**
     * 完成订单
     *
     * @param id
     */
    public void complete(Long id) {

        Orders orders = new Orders();

        orders.setId(id);
        orders.setStatus(Orders.COMPLETED);

        orderMapper.upData(orders);

    }

    /**
     * 拒单
     *
     * @param ordersRejectionDTO
     */
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {

        Orders orders = new Orders();

        BeanUtils.copyProperties(ordersRejectionDTO, orders);
        orders.setStatus(Orders.CANCELLED);

        orderMapper.upData(orders);

    }

    /**
     * 取消订单
     *
     * @param ordersCancelDTO
     */
    public void cancel(OrdersCancelDTO ordersCancelDTO) {

        Orders orders = new Orders();

        BeanUtils.copyProperties(ordersCancelDTO, orders);
        orders.setStatus(Orders.CANCELLED);

        orderMapper.upData(orders);

    }

    /**
     * 各个状态的订单数量统计
     *
     * @return
     */
    public OrderStatisticsVO statistics() {

        //待派送数量
        Integer confirmed = orderMapper.statistics(Orders.CONFIRMED);

        //待接单数量
        Integer toBeConfirmed = orderMapper.statistics(Orders.TO_BE_CONFIRMED);

        //派送中数量
        Integer deliveryInProgress = orderMapper.statistics(Orders.DELIVERY_IN_PROGRESS);

        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();

        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);

        return orderStatisticsVO;

    }

}
